Why is the airport tax at some airport charged outside the airfare ticket but instead must be paid at the airport? Example from Uyuni airport
afghan-citizens
guayaquil
kansai
hanoi
chiayi
belgrade
himalayas
tourist-visas
japan
moldovan-citizens
gas-stations
mauritian-citizens
alps
berat
malta
salt-lakes
pets
hostels
tijuana
criminal-records
vno
add
dead-sea
isle-of-man
grand-teton
tolls
armenia
mauritius
airbnb
dfw